Automated detection of receive coil location

Patent metadata

Field	Value
Publication number	US-2022091202-A1
Application number	US-202017421759-A
Country	US
Kind code	A1
Filing date	Jan 10, 2016
Priority date	Jan 11, 2019
Publication date	Mar 24, 2022
Grant date	—

Abstract

The invention provides for a magnetic resonance imaging system (100, 300). The magnetic resonance imaging system comprises: a subject support (120) configured for moving a subject between a loading position (121) and an imaging position (200); a receive magnetic resonance imaging coil (114) configured for being placed on the subject; and a light detection system (115) comprising at least one ambient light sensor for measuring light data (144). The light detection system is any one of the following: mounted to the main magnet such that the light data is measured from the imaging zone and mounted to the receive magnetic resonance imaging coil. The execution of the machine executable (140) instructions by a processor (130) cause the processor to: move (500) the subject support from the loading position to the imaging position; acquire (502) the light data using the at least one ambient light sensor when the subject support is in the imaging position; determine (504) if the receive magnetic resonance imaging coil is positioned for acquiring magnetic resonance imaging data using the light data; and provide (506) a signal (146) if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data.

First claim

1 - 15 . (canceled)

16 . A magnetic resonance imaging system configured for acquiring magnetic resonance imaging data from an imaging zone, wherein the magnetic resonance imaging system comprises:
a main magnet configured for generating a BO magnetic field within the imaging zone; a subject support configured for moving a subject between a loading position and an imaging position; a receive magnetic resonance imaging coil configured for being placed on the subject; a light detection system comprising multiple ambient light sensors for measuring spatially coded light data from ambient illumination which is spatially encoded in that it has a physical aspect that is different between the loading and imaging positions, wherein the light detection system is mounted to the receive magnetic resonance imaging coil and wherein the multiple ambient light sensors are configured for measuring ambient light distributed across a surface of the receive magnetic resonance imaging coil; a memory configured to store machine executable instructions; a processor configured to control the magnetic resonance imaging system, wherein execution of the machine executable instructions causes the processor to: control the subject support to move from the loading position to the imaging position; acquire the light data using the multiple ambient light sensors when the subject support is in the imaging position; determine if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data using the light data; and provide a signal if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data.

17 . The magnetic resonance imaging system of claim 16 , wherein the magnetic resonance imaging system further includes a multi-channel radio-frequency system configured to acquire the magnetic resonance imaging data, wherein the radio-frequency system includes a body coil and the receive magnetic resonance imaging coil, wherein the receive magnetic resonance imaging coil comprises multiple receive elements, wherein the memory further contains calibration commands configured to control the magnetic resonance imaging system to perform a calibration of the multiple receive elements of the receive magnetic resonance imaging coil using the body coil, wherein execution of the machine executable instructions further causes the processor to:
calibrate the multiple channels of the receive magnetic resonance imaging coil by executing the calibration commands; and provide a hardware failure signal if the calibration fails with the signal indicating that the receive magnetic resonance imaging coil is properly positioned.

18 . The magnetic resonance imaging system of claim 16 , wherein the magnetic resonance imaging system comprises an examination room for housing the main magnet, wherein the examination room comprises a room illumination system, wherein the main magnet comprises a magnet illumination system for illuminating the imaging zone, wherein the room illumination system is configured for producing a first type of light, wherein the magnet illumination system is configured to produce a second type of light, wherein execution of the machine executable instructions causes the processor to determine if the receive magnetic resonance imaging coil is positioned to acquire the magnetic resonance imaging data by differentiating between the first type of light and the second type of light.

19 . The magnetic resonance imaging system of claim 18 , wherein the first type of light differs from the second type of light by any one of the following: a color, an intensity, an oscillation frequency, an intensity of a color component, a modulation of the light, and combinations thereof.

20 . The magnetic resonance imaging system of claim 18 , wherein the magnet illumination system is configured to produce light with a spatially dependent frequency, a spatially dependent color encoding, and/or a spatially dependent modulation.

21 . The magnetic resonance imaging system of claim 20 , wherein execution of the machine executable instructions further causes the processor to determine a spatial position and/or orientation of the receive magnetic resonance imaging coil using the spatially dependent frequency, the spatially dependent color encoding, and/or the spatially dependent modulation produced by the magnet illumination system.

22 . The magnetic resonance imaging system of claim 16 , wherein the receive magnetic resonance imaging coil comprises a preamplifier, wherein the ambient light sensors are attached to the , wherein the receive magnetic resonance imaging coil comprises an optical fiber for each of the ambient light sensors, wherein each optical fiber is configured to channel light from the surface of the receive magnetic resonance imaging coil to one of the ambient light sensors.

23 . The magnetic resonance imaging system of claim 16 , wherein execution of the machine executable instructions causes the processor to determine if the receive magnetic resonance imaging coil is positioned to acquire the magnetic resonance imaging data by inputting the light data into decision module programmed to compare the light data to a set of predetermined criteria.

24 . The magnetic resonance imaging system of claim 16 , wherein execution of the machine executable instructions causes the processor to determine if the receive magnetic resonance imaging coil is positioned to acquire the magnetic resonance imaging data by inputting the light data into a trained machine learning module.

25 . A computer program product comprising machine executable instructions, wherein the machine executable instructions are instructions for execution by a processor controlling a magnetic resonance imaging system as defined by claim 16 , wherein the magnetic resonance imaging system is configured to acquire magnetic resonance imaging data from an imaging zone, wherein the magnetic resonance imaging system comprises a main magnet configured for generating a BO magnetic field within the imaging zone; wherein the magnetic resonance imaging system further comprises a subject support configured for moving a subject between a loading position and an imaging position; wherein the magnetic resonance imaging system further comprises a receive magnetic resonance imaging coil configured to be placed on the subject, wherein the magnetic resonance imaging system further comprises a light detection system comprising multiple ambient light sensors configured to measure spatially coded light data from ambient illumination which is spatially encoded in that it has a physical aspect that is different between the loading and imaging positions, wherein the light detection system is mounted to the receive magnetic resonance imaging coil and wherein the multiple ambient light sensors are configured to measure ambient light distributed across a surface of the receive magnetic resonance imaging coil; wherein execution of the machine executable instructions causes the processor to:
control the subject support to move from the loading position to the imaging position; acquire the light data using the multiple ambient light sensors when the subject support is in the imaging position; determine if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data using the light data; and provide a signal if the receive magnetic resonance imaging coil is positioned for acquiring the magnetic resonance imaging data.

26 . A method of operating a magnetic resonance imaging system, characterized in that the method is configured to operate a magnetic resonance im

Assignees

• Koninklijke Philips Nv

Inventors

• Vernickel Peter
• Leussler Christoph Gunther
• Lips Oliver
• Schmale Ingo
• Findeklee Christian

Classifications

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• G01R33/34007

  Manufacture of RF coils, e.g. using printed circuit board technology; additional hardware for providing mechanical support to the RF coil assembly or to part thereof, e.g. a support for moving the coil assembly relative to the remainder of the MR system · CPC title

• G01R33/341

  comprising surface coils · CPC title

• G01R33/543 Primary

  Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription (G01R33/546 takes precedence) · CPC title